hvs 中文意思是什麼

Makes general analysis and research on human visual system the characteristicness of human visual system is the process being considered firstly for every image process technology, include watermark technology, in order to join the characteristicness of hvs and the watermark technology together, this paper analyses and researches the hvs theoretics particularly firstly. it build the aesthesia models and the jnd models after discussing eyes " biology configuration particularly and expatiating eyes " aesthesia process. these works provide the foundation for the later research of watermark channel capacity and the watetmark embedding intensity. 2

對人類視覺系統的特性進行了全面的分析和研究人類視覺系統的特性是任何圖像處理技術必須優先考慮的環節，數字水印技術也不例外，為了使人類視覺系統的特性和數字水印技術很好地結合，本文首先對人類視覺系統理論進行了全面細致的分析和研究，在詳細闡述了人眼的生理結構及人眼對顏色的感知過程的基礎上，建立了人眼的感知模型和人類視覺系統的jnd模型，這些工作為后來水印通道容量的研究、水印嵌入強度的確定等工作奠定了基礎。

The wavelet coefficients are selected by human visual system ( hvs ) to ensure the transparence of watermarking

同時基於人眼視覺系統，對嵌入系數進行篩選以保證水印的透明性。

Human vision system ( hvs ) theory is very important for image watermarking technology

人類視覺系統理論在圖像數字水印技術中有著非常重要的應用。

A cbr ( constant bit rate ) coding algorithm based on traits of human visual system ( hvs ) is proposed

根據人體視覺系統（ hvs ）的特點，提出了一種固定碼率壓縮演算法。

Not only is it a crucial feature of objects, but also an important part of hvs ( human visual system )

對稱性既是物體的重要特徵，又是人類視覺感知組織系統中的重要組成部分。

Then we make a deep research on human visual system and wavelet transformation, and a new wavelet watermarking method based on hvs is proposed to solve the conflict between robustness and imperceptibility

在此基礎上，論文又將人眼視覺系統和小波變換結合在一起，提出了一種基於hvs的小波水印演算法，人眼視覺模型的應用緩解了演算法魯棒性和不可見性間的矛盾。

We detected a significant quantity of endotoxin in the artery and in the portal and the hvs ( p < 0. 001 )

我們在動脈和門靜脈、肝靜脈內檢出了大量的內毒素（ p < 0 . 001 ） 。

Series hv / hvs vickers hardness tester, that is composed of precision mechanism, optical system and electric technology, is used to measure vickers hardness of either metallic materials or non - metallic materials

Hvs系列維氏硬度計是由精密機械，光學系統和先進技術萃合而成的材料硬度測定儀器，用於測定黑色金屬、硬度合金、有色金屬、表面滲氮層、氮化或非金屬材料的維氏硬度，可用於各行各業的金屬材料、大專院校等。

The image probably occurs color distortion that is influenced by optical equipment. in this paper, the hvs color invariance characters is construed, an complexion rectify algorithm based that is proposed, which can automatically adjust and compensate the image quality according to the external environment influence

攝像頭受外界光學環境的影響，採集的人像經常有顏色失真現象，本文通過對hvs的顏色恆常性特徵的分析，提出了基於hvs顏色恆常性的膚色校正演算法，可以自動校正和補償因外界影響而發生變化的人像膚色。

Most of these standards are based on the method of inter - frame motion compensation and two - dimensional discrete cosine transform ( 2d - dct ) and encode and describe the color video in ycbcr 4 : 2 : 0 format, which want to take advantage of human visual system ( hvs ) to save bit expense by decreasing the resolution of two color difference components

當前國際上的壓縮標準普遍採用幀間運動補償加幀內二維離散餘弦變換的編碼方法，並且將彩色視頻序列表示為ycbcr格式，試圖利用人眼的視覺特性降低對色差信號的解析度來節省比特開銷。

Examinations show that our arithmetic can make good use of hvs system, and is robust to common image processing such as noise, mean - filter, sub - sample and jpeg compress. string - type watermark is more robust

經過試驗檢驗，該演算法不僅能很好地結合hvs系統，且對一般圖像處理（對抗噪聲、均值濾波、亞抽樣和jpeg壓縮）都具有好的魯棒性，字元型水印的效果更佳。

This paper employed the characteristics of the hvs ( human visual system ) responded to the image contents and realized the two kinds of image - adaptive watermark algorithm, one is in the spatial domain based on the statistics theory and another in the dct domain with meaningful digital watermark

本文利用hvs人類視覺系統模型，提出了圖像內容自適應的數字水印演算法，分別實現了時空域中的統計原理水印演算法和dct變換域中的有意義水印演算法。

Watermarking algorithm of good perception property can be designed by making full use of vision masking of hvs

進行水印嵌入時，充分利用人類視覺系統的視覺掩蔽特性，可以設計出感知性能良好的數字水印演算法。

But, though considerable process has been made in the last ten years, digital watermarking is still in its infancy, and much interesting work remains to be done this thesis addresses some problems in the gray - scale image digital watermarking that are summarized below : 1 ) whereas the basic theory of digital watermarking is still very poor, a digital watermarking mathematic model based on imperceptibility and robustness is presented by analysising the characteristic of digital watermarking ; 2 ) based on the model constructed above, by defining the measures of capacity and robustness of digital watermarking, an objective method for evaluating the digital watermarking is introduced and used to analysis some algorithms ; 3 ) whereas geometric distortion always influences the restoration of watermark, we advocate to enhance the robustness against geometric distortion by restoring the image which has been distorted by geometric transformation, and a method is designed for estimating the parameters of geometric transformation ; 4 ) based on the conclusion discussed above, and combined with the masking effects of hvs, a novel public meaningful gray - scale image digital watermarking is designed by analysising the characteristics of image gray - scale interpolation and haar wavelet transformation. the experimental results show that the method is indeed powerful ; 5 ) whereas many image digital watermarking schemes, which embed watermark by modifying the values of pixels in spatial domain and transformed domain, are confronted with the conflict between the imperceptibility and robustness, we advocated to use some stable digital characteristics of host image as watermark and a algorithm based on hermite matrix is designed

本文重點對灰度圖象數字水印技術進行研究，主要工作如下： 1 ）鑒于目前數字水印的理論研究比較薄弱的現狀，本文通過分析數字水印的特點，建立了一個數字水印的數學模型，為進一步研究數字水印打下了基礎； 2 ）根據以上建立的模型，通過引入容量和穩健度的概念為數字水印提供了一個客觀評價方法，並對一些數字水印演算法進行了分析； 3 ）為增強數字水印抵抗幾何攻擊的能力，研究了受幾何攻擊的圖象的復原問題，並給出了一個計算圖象幾何變換參數的方法； 4 ）通過分析圖象灰度插值演算法和haar小波變換的特點，結合hvs的掩蔽效應，設計了一個公開的有意義數字水印演算法，實驗結果表明本演算法具有較強的穩健性； 5 ）目前許多水印演算法都是通過在空域或頻域修改象素值的方法嵌入水印的，這種方法面臨著透明性和穩健性的矛盾，為解決這個矛盾，本文提出以圖象的某些穩定的數字特徵為水印的觀點，並結合hermite矩陣的特點設計了相應的水印演算法，實驗結果表明該演算法具有較好的穩健性。

Using the above algorithms, h. 263 baseline video - encoder implementation can encode more than 40fps in qcif resolution on a pentium mmx 500 - mhz computer. almost ali of the low bit - rate video compression techniques degrade quality. to combine the video quality evaluation with hvs, the relationship betvveen the motion activity and perceptual video quality are studied, and a video quality evaluation method based on motion activity is proposed, in which video defmition and smoothness are defined

本文提出一種基於運動特徵的視頻質量評價方法，考慮了人眼對視頻信號感受質量與畫面運動劇烈程度之間的關系，分別討論了反映視頻質量的視頻清晰度和流暢度，評價結果更符合人眼視覺特性，並且這種評價對編碼具有一定的指導作用。

They include profesor jan deroos, hvs international professor of finance and real estate, cornell university, professor timothy riddiough, e. j. plesko chair, university of wisconsin - madison, and professor robert edelstein, real estate development chair, university of california - berkeley

大會邀請到三位譽滿國際的知名學者作專題演講，他們分別是美國康乃爾大學hvsinternational財務及不動產講座教授janderoos教授、美國威斯康辛麥迪遜大學e

A deblocking algorithm based on hvs

基於內容統計的彩色視頻

In spatial domain, according to the characteristics of hvs ( human visual system ), we introduce several approachs based on images " deviation, images " flatness measurement, fuzzy classification, and an approach based on difference matrix as well

在空間域內，利用人的視覺特性，我們提出了基於圖象方差、圖象平坦測度、模糊分類的隱藏演算法，同時提出了基於差值矩陣的信息隱藏。

2 ) the embedded zero - tree wavelet algorithm, which is proposed by shapiro, is analyzed. regarding to its shortcomings, a new quantization method based on zero - tree is presented. in addition, this method needs to match the hvs characteristics

2 ）仔細分析了shapiro的嵌入式零樹編碼演算法，根據其在量化過程中存在的問題，提出了一種改進的零樹量化演算法，並在量化過程中充分考慮了人的視覺特性對于重構圖象質量的影響。

Digital watermarking algorithm for color image based on iwt and hvs

的彩色圖像數字水印演算法